Repair-jack.



D'. ROUNDS.

REPAIR JACK.

' APPLICATION FILED 11111112.12, 1912.

Patented July 14, 1914.

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DANIEL ROUNDS, OF PORTLAND, MAINE.

REPAIR-JACK.

Specicaton of Letters Patent.

Application filed September 12, 1912. Serial No. 719,903.

To all whom it may concern Be it known that I, DANIEL Romans, a citizen of the United States, residing at Portland, in the county of Cumberland and State of Maine, have invented certain new and useful Improvements in Repair-Jacks, of which the following is a specification.

This invention relates to improvements in shoemakers repair jacks. These usually consist of a pedestal upon which is mounted a last supporting device which is rotatable in both horizontal and vertical planes. In jacks as at present constructed, when the last supporting device is turned in a vertical plane in either direction, the lastis carried very much below its normal position, thus making the jack vary greatly in heightfrom the floor and in that respect rendering it inconvenient for the workman.

In the drawing herewith accompanying and makinga part of this application, Fig ure 1 is a side elevation of my improved repair jack; Fig. 2 is a side elevation of the same when the last holder is tipped into horizontal position, showing the underside of the table, a portion of the pedestal being'r removed; Fig. 3 is a vertical sectional detail showing the ring, strap carrier and plate upon which the ring and carrier are mounted; and Fig. 4 is a plan view of the ring, strap carrier and means for locking the strap carrier to the ring. j

Same reference characters indicate like parts in the several figures." y

The object ofthe present invention isto provide a jack in which the last supporting device, when turned in a vertical plane, is automatically caused to rise as it is turned, compensating in large measure for the downward movement due to the vertical turning. It ispalso designed to provide an inexpensive, easily operable repair jack. To this'end, it consists ofk a pedestal A terminating at the top in bifurcated supporting arms B. Rotatably mounted upon a bar E rigidly set in these arms is a table C provided in the top with grooves or channels P to serve to lessen the weight of the machine and with ears D through which the bar passes. One of the ears D is provided with a series of ratchet teeth F and the table is adapted to be locked against vertical turning by means of a vertically reciprocating locking pin G, which is normally held up against said ratchet teeth by a spring II, the upper end of the spring being made fast to the pin tween shank. The lower end of the pin is connect- Patented July 14, 1914. A

ed to a foot treadle I by means of a connectl ing link. or chain K. Superposed. upon the table C 1s a plate L which is secured to table C by means of headed bolts M secured to the l y.underside of the plate and passing through slots N lin the table.

On the underside of plate L are one or more transversely extending' racks O and upon shaft E are gears P adapted to project upwardly through slots j Q, in the table C and to mesh with the teeth in racks O in the plate L. Secured to plate L and adapted to rotate in a plane parallel therewith is a ring R upon which is set at one end a toe support S and at the other end a heel vsupport T. The mechanism shown for securing ring R to plate L is new and a part of my invention. 4

The plate L is vprovided with an upraised rib V spaced apart from the edge forming a ledge U upon which the ring R is mounted.

andl against the raised part V of which the ring revolves. The ring is held in place by a keeper U set on the top of the part V which keeper overlaps the inner edge of the ring, thus holding it in place upon plate L. The heel support is pivotally 4attached to a post X set on the ring and is adjustable by means of a threaded bolt Y. The toe support is longitudinally adjustable in a vertically slotted post Z mounted on said ring and may be looked in any given place by a set screw Z. To hold the last on the'jack, I provide a strap 1 adapted fto pass over the last and through a rotatable carriery 2 set in the top of plate L and held in place preferably upon plate L. The carrier is provided with two slots 3 through which the strap passes, the central part of the under yside of the carrier being countersunk, as seen at U2 to give space for the strap to pass freely bethe top of the plate L andthe bottom of the carrier.

The carrier may be locked against accidental rotation bymeans of a spring pawl 4 pivotally attached to the carrier and adapted to take into a series of in-v dentations 5 in the ring, whereby the carrier normally moves with the ring but may l by the keeper U which-holds the ringy As the holding meohanism 'is' being-turned tioal position Which may be called the normal position of the maehine. It may then be rotated in a horizontal plate by turning the ring on the supporting plate. It may also be turned in a vertical plane so that the Vsupports are at right angles to said normal position on either side ot' the machine When Work is to be done on either side ol' the shoe and While in this latter position the ring maybe rotated but now in' a vertical plane.

tofright angles fromthe normal position,

1' the ring'and plate are 'caused toftravel up'- wardly relative to the table by reasonof the ranged to have rotary motion about both v liorizontal and verticalV aires, and means for automatically 'causing theuvvorlr support to rise or fall in response to the turning movement of' the Work support about its horizontal axis. l

2. In, l a repair jack, a pedestal, a vvork i supportmounted in said pedestal and arranged to have'rotary motion yabout both horizontal and vertical axes, and means for automatically Causing said Work support to rise or fall with a graduated regular motion e l A K A Vmounted on said vpedestal arranged to have in response tothe turning movement of the Work support on its horizontal axis. e

3. Ina repair jack, apedestal, a table `mounted"on said pedestal vadapted to have vertical rotation, a .platey mounted on said i table and` adapted to' have sliding move'- ment relative thereto, and a Work supporting ring mounted on said platerand adapted to be rotatedr relative to said plate.

4L, In a repair jack, vva pedestahal table pivotally supported on ksaid pedestal, a. plate mounted onsaid .table and adapted to have slidin movement relative thereto means for causing said plate to slide on said table When thetable is rotated, and a IWork supL port mounted on said plate.

5. In a repair jack, a pedestal, a shaft Y With a slot, a plate adapted to have sliding movement relative to said table, a gear rig-A idly seenred on the shaft, a rackon the un` der side of the plate, the gear on the shaft being adapted to project throughthe slot in the table into engagement with the rack on the under side of theplate, and a vvor'lr support mounted on said plate. y 'I Y 6i. I-n a repair jack, a pedestal, a table mounted on said pedestal arranged `to have rotation' about a horizontal axis, a plateyon said table and adapted to have sliding'movementy relative thereto, a Work supporting ring mounted on said plate and adapted tok bevrotated relative to said plate, a 'Work holding strap carrier-,and means for lock'- ing the strap carrier vto the supporting ring.

7. Inra repair jack, apedestal, a table mounted on said pedestal arranged to have rotation about a yhorizontal 'axisfa plate -mounted on said table and adapted to have sliding'inovement relative thereto, a WorkV supporting ring mounted onsaid plate and adapted tobe vrotated relative to said plate, and a rotatable Work holding stra-p carrier mounted 'on said plate, said strap carrier being manually rotatable independently of saidr'ing. Y y i 8. In a repair jack, a pedestal, "a table rotation about a horizontal a-X'is, a plate C supporting ring mounted on 'said plate andadapted to be rotated relative to said plate,

a rotatable Work holding strap earier mounted on said plate, said strapfearr-ier being manually rotatable independently of said ring', and means for loeliing'the strap carrier inv any desired position. e v

DANIEL R'OUNDS.

Witnesses:

Y ELGIN C. VRRrLL,

MARYV C. PAGE.

. Copies of this patent may be obtained for ive cents each, by addressing the om'inissiiie of "ateiit, 

